Has an AFL game ever ended 173-55?
Exactly once. On August 9, 1975, Hawthorn beat Geelong 173-55, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 173-55 in league history.
That makes 173-55 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 174-55 has happened never and 173-56 has happened 1 times.